Marconi Instruments TF 2502 - Connections

Marconi Instruments TF 2502

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0 INSERT

PROBE

control

adjusts

the

input

to

the

diode

detector.

0 MOD OUT

jack

accepts

2-pole

telephone

plug

for

connection

to

oscilloscope

or

high

impedance

headphones

to

monitor

amplitude

modulation.

2.3

CONNECTIONS

0·223~

:!:

·009"

Fig.

2.2

Cross

section

of

type N

connector

(male)

showing

critical

dimension

A

knurled

retaining

ring

is

fitted

to

the

type N

connector

to

prevent

movement

of

the

detector

unit

during

transit.

Before

using

the

power

meter,

unscrew

this

ring

and

pull

off

the

plastic

cap

from

the

connector.

Keep

both

these

items

for

re-use

if

the

instrument

has

to

be

transported.

!cAUTION

I

When

making

connection

to

the

input

socket

it

is

important

to

use

the

free

type

N

connector

supplied

as

an

accessory.

If

another

type N

connector

is

used

then

it

is

essential

to

ensure

good

reliable

mating.

To

achieve

this

the

inner

contact

depth,

i.

e.

the

distance

from

the

shoulder

on

the

pin

to

the

interface

as

shown

in

Fig.

2. 2,

must

be

0.223

in

±0.009

in

(5.92

mm

±0.23

mm)

conforming

to

US

Spec.

MIL-C-71B.

Type

numbers

of

coaxial

cables

suitable

for

use

with

the

plug

are

as

follows:

United

Kingdom:

Amphenol

No.

82-312

Joint

Services

5935-99-943-4155.

United

States:

Military

No.

UG-1185/U.

NOTE:

To

prevent

accidental

interchange

of

parts

with

those

of

other

instruments

in

the

series,

the

following

items

of

the

R.

F.

Power

Meter

TF

2502

are

colour

coded

YELLOW.

In

addition

identification

labels,

bearing

the

same

serial

number,

are

fitted

on

each

of

the

units

which

make

up

the

complete

instrument.

(a)

The

plastic

cover

of

the

detector

unit.

2502 (1a)

7